name : router_broadcast.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 ALL_TESTS="ping_ipv4" NUM_NETIFS=6 source lib.sh h1_create() { vrf_create "vrf-h1" ip link set dev $h1 master vrf-h1 ip link set dev vrf-h1 up ip link set dev $h1 up ip address add 192.0.2.2/24 dev $h1 ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1 ip route add 198.51.200.0/24 vrf vrf-h1 nexthop via 192.0.2.1 } h1_destroy() { ip route del 198.51.200.0/24 vrf vrf-h1 ip route del 198.51.100.0/24 vrf vrf-h1 ip address del 192.0.2.2/24 dev $h1 ip link set dev $h1 down vrf_destroy "vrf-h1" } h2_create() { vrf_create "vrf-h2" ip link set dev $h2 master vrf-h2 ip link set dev vrf-h2 up ip link set dev $h2 up ip address add 198.51.100.2/24 dev $h2 ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1 ip route add 198.51.200.0/24 vrf vrf-h2 nexthop via 198.51.100.1 } h2_destroy() { ip route del 198.51.200.0/24 vrf vrf-h2 ip route del 192.0.2.0/24 vrf vrf-h2 ip address del 198.51.100.2/24 dev $h2 ip link set dev $h2 down vrf_destroy "vrf-h2" } h3_create() { vrf_create "vrf-h3" ip link set dev $h3 master vrf-h3 ip link set dev vrf-h3 up ip link set dev $h3 up ip address add 198.51.200.2/24 dev $h3 ip route add 192.0.2.0/24 vrf vrf-h3 nexthop via 198.51.200.1 ip route add 198.51.100.0/24 vrf vrf-h3 nexthop via 198.51.200.1 } h3_destroy() { ip route del 198.51.100.0/24 vrf vrf-h3 ip route del 192.0.2.0/24 vrf vrf-h3 ip address del 198.51.200.2/24 dev $h3 ip link set dev $h3 down vrf_destroy "vrf-h3" } router_create() { ip link set dev $rp1 up ip link set dev $rp2 up ip link set dev $rp3 up ip address add 192.0.2.1/24 dev $rp1 ip address add 198.51.100.1/24 dev $rp2 ip address add 198.51.200.1/24 dev $rp3 } router_destroy() { ip address del 198.51.200.1/24 dev $rp3 ip address del 198.51.100.1/24 dev $rp2 ip address del 192.0.2.1/24 dev $rp1 ip link set dev $rp3 down ip link set dev $rp2 down ip link set dev $rp1 down } setup_prepare() { h1=${NETIFS[p1]} rp1=${NETIFS[p2]} rp2=${NETIFS[p3]} h2=${NETIFS[p4]} rp3=${NETIFS[p5]} h3=${NETIFS[p6]} vrf_prepare h1_create h2_create h3_create router_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore router_destroy h3_destroy h2_destroy h1_destroy vrf_cleanup } bc_forwarding_disable() { sysctl_set net.ipv4.conf.all.bc_forwarding 0 sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0 sysctl_set net.ipv4.conf.$rp2.bc_forwarding 0 } bc_forwarding_enable() { sysctl_set net.ipv4.conf.all.bc_forwarding 1 sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1 sysctl_set net.ipv4.conf.$rp2.bc_forwarding 1 } bc_forwarding_restore() { sysctl_restore net.ipv4.conf.$rp2.bc_forwarding sysctl_restore net.ipv4.conf.$rp1.bc_forwarding sysctl_restore net.ipv4.conf.all.bc_forwarding } ping_test_from() { local oif=$1 local dip=$2 local from=$3 local fail=${4:-0} RET=0 log_info "ping $dip, expected reply from $from" ip vrf exec $(master_name_get $oif) \ $PING -I $oif $dip -c 10 -i 0.1 -w $PING_TIMEOUT -b 2>&1 \ | grep "bytes from $from" > /dev/null check_err_fail $fail $? } ping_ipv4() { sysctl_set net.ipv4.icmp_echo_ignore_broadcasts 0 bc_forwarding_disable log_info "bc_forwarding disabled on r1 =>" ping_test_from $h1 198.51.100.255 192.0.2.1 log_test "h1 -> net2: reply from r1 (not forwarding)" ping_test_from $h1 198.51.200.255 192.0.2.1 log_test "h1 -> net3: reply from r1 (not forwarding)" ping_test_from $h1 192.0.2.255 192.0.2.1 log_test "h1 -> net1: reply from r1 (not dropping)" ping_test_from $h1 255.255.255.255 192.0.2.1 log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)" ping_test_from $h2 192.0.2.255 198.51.100.1 log_test "h2 -> net1: reply from r1 (not forwarding)" ping_test_from $h2 198.51.200.255 198.51.100.1 log_test "h2 -> net3: reply from r1 (not forwarding)" ping_test_from $h2 198.51.100.255 198.51.100.1 log_test "h2 -> net2: reply from r1 (not dropping)" ping_test_from $h2 255.255.255.255 198.51.100.1 log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)" bc_forwarding_restore bc_forwarding_enable log_info "bc_forwarding enabled on r1 =>" ping_test_from $h1 198.51.100.255 198.51.100.2 log_test "h1 -> net2: reply from h2 (forwarding)" ping_test_from $h1 198.51.200.255 198.51.200.2 log_test "h1 -> net3: reply from h3 (forwarding)" ping_test_from $h1 192.0.2.255 192.0.2.1 1 log_test "h1 -> net1: no reply (dropping)" ping_test_from $h1 255.255.255.255 192.0.2.1 log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)" ping_test_from $h2 192.0.2.255 192.0.2.2 log_test "h2 -> net1: reply from h1 (forwarding)" ping_test_from $h2 198.51.200.255 198.51.200.2 log_test "h2 -> net3: reply from h3 (forwarding)" ping_test_from $h2 198.51.100.255 198.51.100.1 1 log_test "h2 -> net2: no reply (dropping)" ping_test_from $h2 255.255.255.255 198.51.100.1 log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)" bc_forwarding_restore sysctl_restore net.ipv4.icmp_echo_ignore_broadcasts } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS